Fabric dyeing with colorimetric pH‐responsive colours

Peila, Roberta; Varesano, Alessio; Vineis, Claudia; Bobba, Vittorio; Bobba, Jacopo; Piriou, Anne; Barazzotto, Michele

doi:10.1111/cote.12511

Cited by 10 publications

(7 citation statements)

References 25 publications

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“…When in acidic and neutral mediums, CC mostly exists in the keto-form, while in alkaline conditions, it exists in the enol-form. The keto-form is responsible for the yellowish color, while the reddish-brown color is the result of the dominancy of the enol-form. , Figure A demonstrates the absorbance wavelength red shift trend of the CC solution when exposed to acidic to alkaline conditions.…”

Section: Resultsmentioning

confidence: 99%

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Fast Fabrication of Multifunctional PCL/Curcumin Nanofibrous Membranes for Wound Dressings

Teodoro

Alvarenga

Oliveira

et al. 2023

ACS Appl. Bio Mater.

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Therapeutic intervention to skin wounds requires covering the affected area with wound dressings. Interdisciplinary efforts have focused on the development of smart bandages that can perform multiple functions. In this direction, here, we designed a low cost (U$0.012 per cm 2 ) multifunctional therapeutic wound dressing fabricated by loading curcumin (CC) into poly(ϵ-caprolactone) (PCL) nanofibers using solution blow spinning (SBS). The freestanding PCL/CC bandages were characterized by distinct physicochemical approaches and were successful in performing varied functions, including controlled release of CC, colorimetric indication of the wound conditions, barrier against microorganisms, being biocompatible, and providing a photosensitive platform for antimicrobial photodynamic therapy (aPDT). The chemical nature of PCL and CC and the interactions between these components allowed CC to be released for 192 h (ca. 8 days), which could be correlated with the Korsmeyer−Peppas model, with a burst release suitable to treat the inflammatory phase. Due to the CC keto−enol tautomerism, an optical indication of the healing status could be obtained using PCL/CC, which occurred immediately, ranging between red/orange and yellow shades. The effect against pathogenic microorganisms evaluated by agar disc-diffusion, affected skin wound simulation (ex vivo), and microbial penetration tests demonstrated the ability to block and inhibit microbial permeation in different environments. The biocompatibilities of PCL and PCL/CC were verified by in vitro cytotoxicity study, which demonstrated that cell viabilities average above 94 and 96% for human dermal fibroblasts. In addition, the proposed bandage responded to aPDT applied to an in vivo assay, showing that, when irritated, PCL/CC was able to reduce the bacteria present on the real wound of mice. In summary, our findings demonstrate that using PCL and CC to produce nonwovens by the SBS technique offers potential for the rapid fabrication of biocompatible and multifunctional wound dressings, paving the way for large-scale production and utilization of such dressings in the treatment of skin wounds.

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Section: Resultsmentioning

confidence: 99%

“…The keto-form is responsible for the yellowish color, while the reddish-brown color is the result of the dominancy of the enol-form. 15,16 Figure 4A demonstrates the absorbance wavelength red shift trend of the CC solution when exposed to acidic to alkaline conditions.…”

Section: Ph-stimulated Colorimetricmentioning

confidence: 99%

Fast Fabrication of Multifunctional PCL/Curcumin Nanofibrous Membranes for Wound Dressings

Teodoro

Alvarenga

Oliveira

et al. 2023

ACS Appl. Bio Mater.

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“…Figure 2A illustrates the absorbance of madder at different pH. Under acidic conditions, the dye showed an absorption peak at wavelengths of 250‐300 nm that corresponded to violet‐blue absorption wavelengths, as the perceived colour of the solution was yellow 25 . As the pH of the madder solution increased, the maximum absorption wavelength of the solution increased, and the visual colour transitioned from yellow to purple.…”

Section: Resultsmentioning

confidence: 99%

“…Under acidic conditions, the dye showed an absorption peak at wavelengths of 250-300 nm that corresponded to violetblue absorption wavelengths, as the perceived colour of the solution was yellow. 25 As the pH of the madder solution increased, the maximum absorption wavelength of the solution increased, and the visual colour transitioned from yellow to purple. The reason for this phenomenon is that the β-OH in hydroxyl anthraquinone derivatives loses its H + under weak conditions, and both phenolic hydroxyl groups become O − under strong alkaline conditions (pH ≥ 10).…”

Section: Uv-vis Spectra Analysismentioning

confidence: 99%

pH‐responsive cotton fibre dyed by natural madder dye

Zhu

Huang

et al. 2021

Coloration Technology

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pH-responsive cotton can be used as a flexible sensor because it changes colour with pH. However, the safety of some synthetic pH-responsive dyes is uncertain, so the application of pH-responsive cotton to wounds is limited. Herein, natural madder dye was selected to explore the dyeing conditions and produce safe, pHresponsive cotton. Based on experimental data and computational calculations, the variation in the conjugation of the molecule was responsible for the colour change of the cotton dyed with madder. When the pH of the madder solution increases, the phenolic hydroxyl group of the alizarin, which is its main component, is ionised, and the colour changes from yellow to purple. The effect of the dye concentration was studied, and the results showed that the higher the dye concentration, the more obvious the colour change of the cotton. The reversibility of cotton dyed with madder was investigated, and the results showed that there was a good reversible transformation with changing pH. The reversibility time of the colour change was less than 20 seconds.How to cite this article: Zhu S, Huang Z, Yu X, et al. pH-responsive cotton fibre dyed by natural madder dye.

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“…pH detection can bring great impact in protecting human life as it will be the first hazard detection at any occurrence. Recently, new researchers fabricated wound dressing 5–8 and protective clothing that able to detect infection or/and harmful acidic and toxic environment in real‐time at the workplace 9,10 . Van der Schueren et al 7 fabricated wound bandage that changes color upon infection where a healed wound will show yellow color (slightly acidic) and turn to purple if an infection is present.…”

Section: Introductionmentioning

confidence: 99%

Halochromic poly (lactic acid) film for acid base sensor

Yam

Rusli

Hamid

et al. 2020

J of Applied Polymer Sci

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A novel strategy to engineer biodegradable halochromic film based on poly (lactic acid) (PLA) for pH sensorial substances was presented. The effect of polyethylene glycol (PEG) compositions and dye amount on the efficiency of halochromic pH film was observed. The interactions between PLA, PEG, and dye was evidence by Fourier transform infrared. UV-VIS results indicated the sensitivity of the halochromic film through color changes. Mechanical performance was investigated by tensile testing to assess the potential of the halochromic film. It was found that the halochromic pH film has a clear color response from yellow to purple at pH 3-11 with a rapid response time within a minute. The results also revealed that varying content of PEG showed a significant effect on response time compared with varying dye compositions. PLA/PEG film and dye formed new interactions where PEG increased the free volume of PLA and made it possible for the PEG and the dye to diffuse and entrap between PLA chain. In term of the film strength, the addition of PEG and dye improved the flexibility of PLA film, which enables great potential in many applications such as medical, textile, and packaging.

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Fabric dyeing with colorimetric pH‐responsive colours

Cited by 10 publications

References 25 publications

Fast Fabrication of Multifunctional PCL/Curcumin Nanofibrous Membranes for Wound Dressings

Fast Fabrication of Multifunctional PCL/Curcumin Nanofibrous Membranes for Wound Dressings

pH‐responsive cotton fibre dyed by natural madder dye

Halochromic poly (lactic acid) film for acid base sensor

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